<%@ page language="java" import="java.util.*" contentType="text/html; UTF-8"
    pageEncoding="UTF-8"%>
<%  
String path = request.getContextPath();  
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";  
%>     
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
<title>Insert title here</title>
<base href="<%=basePath%>">  
</head>
<body>
路径:<%= basePath %>，现在时间是<%= new Date() %>  
</body>
</html>